Question
The ratio of present age of A to that of B is 5:4 and
the ratio of present age of A to that of C is 5:6. The average present age of A, B and C is 20 years. Find the age of B, after 8 years. TYPE HSolution
The ratio of present age of A, B and C = 5 : 4 : 6 (5x, 4x,6x) The average present age of A, B and C = 20 years => (5x + 4x + 6x)/3 = 20 => 15x = 60 => x = 4 The age of B, after 8 years = 4 × 4 + 8 = 24 years
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